package com.qfedu.hotelssm.util;

/**
 * @author wl
 * @ date 2022/8/29
 */
public class FileUtil {
    public static String reName(String f){
        if(f.length()>30){
            f=f.substring(f.length()-30);
        }
        return System.currentTimeMillis()+"_"+f;
    }
}
